Fritz mink



(No Model.)

1?. MINK. WATCH BOW FASTENER.

N0. 553 Patented Jan. 28, 1896.

Invent m Attorney.

m m J m E W UNITED STATES PATENT OFFICE.

FRITZ MINK, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THE KEY- STONE \VATCII CASE COMPANY, OF SAME PLACE.

WATCH-BOW FASTEN ER.

SPECIFICATION forming part of Letters Patent No. 553,589, dated January 28, 1896. Application filed June 4, 1894:. Serial No. 513,348. (No model.)

To all whom it may concern: ing the end of the bow before and after it has Be it known that I, FRITZ MINK, of the city been enlarged or expanded. Fig. 9 is a verand county of Philadelphia and State of Penntical sectional View of a watchcase pendant sylvania, have invented an Improvement in and bow, illustrating another modification of IVatch-Bow Fasteners, of whichthe following the invention; and Figs. and 11 are vertiis a specification. cal sectional views of the same on the line ,2 .5 My invention relates to watch-bow fastenof Fig. 9, respectively, showing the end of the ers; and it consists of certain improvements bow before and after it has been enlarged or which are fully set forth in the following speciexpanded. 1o fication and shown in the accompanying draw- A is the watchease-pendant, which maybe in gs. of any suitable construction, and is provided It is the object of my invention to enable in its opposite sides with the apertures B. the ends of a watchcase-bow to be conven- These apertures may be, and preferably are, iently and economically fastened to the pendenlarged upon the interior, as shown at O.

I 5 ant and to avoid the employment of auxil D is the watchcase-bow, the ends of which iary locking devices, such as collars, pins, or are free to pass freely through the apertures nuts. 13 in the pendant. The ends of the bow are In carrying out my invention I provide the provided upon their extremities with slits, re-

ends of the bow in the faces of its extremities cesses or depressions adapted to receive a tool 20 with cuts, slits, or depressions, and after the and permit the metal of the ends to be exends have been inserted in apertures of the panded laterally upon the inside to a diamependant I enlarge these cuts, slits, or deprester or lateral width greater than the outside sions by means of a tool or die from the in diameter of the apertures 13. By this enlargeterior of the pendant so asto expandthe metal ment or expansion of the ends of the bow 2 5 laterally to a width greater than the diameter they are fastened against passage through the of the aperture through which the ends are apertures. inserted. By this means the ends of the bow I do not limit myself to any special form of are fastened, while they are permitted to have slits, recesses or depressions.

the usual swinging movement in the aper- In Figs. 1, 2, and 3 I have shown the ends 0 tures. provided with two crossed slits E F; in Figs.

Referring now to the drawings for greater 1, 4., and 5 with a single slit G; in Figs. (3, 7, particularity, Figure 1 is a vertical sectional and S with a radial cut II, and in Figs. 9,10, view of a watchcase pendant and bow emand 11 with a central cut or recess I. bodyin g my invention, with the opposite ends To expand the ends of the bow I insert the 5 5 of the bow illustrating slightly-different 0011- point or end of a tool through the interior of 8 5 structions. Fig. 2 is a vertical sectional view the pendant into the slits, cuts or recesses, and of the same on the line so as of Fig. 1, looking by twisting or turning the tool open the slits, to the left, showing the end of the bowbefore and thus expand the metal laterally so as to it has been enlarged or expanded. Fig. 3 is a enlarge the end of the bow beyond the diame- 0 similar view showing the end of the bow exter of the aperture I3. 0 panded. Fig. 4 is a view of a portion of the In Figs. 2, at, 7, and 10 the ends of the bow interior of the pendant, looking to the right are shown before they have been expanded or in Fig. 1, showing the end of the bow before enlarged by the tool or instrument. it has been enlarged or expanded. Fig. 5 is a It is not material to my invention whether 5 similarview showing the bow after it has been the slits, cuts, or recesses are made in the ex- 5 expanded. Fig. 6 is avertical sectional view tremities of the bow before or after the ends of a watchcase pendant and bow, illustrating have been inserted in the apertures.

a modification of my invention. Figs. 7 and If desired, the enlargements 0 about the ap- 8 are each vertical sectional views of the same ertures B on the inside of the pendant may 50 on the line y y of Fig. 6, respectively, showbe omitted. In some classes of cases, as in pendant-setting and stem-winding cases, I prefer to employ these enlargements, as they form seats and permit the extremities of the bow to be expanded without projecting 1nateriallyinto the tubular bore of the pendant, and thus interfering with the stemsetting devices.

If desired, the extremities of the bow may be filed or cut down to a small extent to re move roughness and diminish the size of the expanded portions. The ad vantages possessed by this fastening device are that no auxiliary or separate locking devices are necessary, and that as the ends of the how are of the same or substantially the same diameter as the bow comparatively large bearings are formed by the laterally-expanded portions of the metal, so that the fastening is durable and strong.

I do not limit myself to the minor details of eoi'istruction shown.

lVhat I claim as new, and desire to secure by Letters Patent, is

The combination of a watch case pendant provided with apertures in its sides of conical form flaring inward a bow having its ends of a diameter substantially equal to the full diameter of the body of the bow, and provided upon their extremities with transverse slits or cuts, and having the metal on each side of the slits or cuts bent out laterallyso as to expand the extremities of the ends of the bow on the inside of the apertures to substantially lill the said conical apertures and having bear ings against their walls.

In testimony of which invention I have he reunto set my hand.

FRITZ illlN'K.

'itnesseu ERNEST HOWARD IIUNTEl-t, ll. L. MOTHERWELL. 

